352-001 · Question #204
Which statement is true about the RSVP protocol?
The correct answer is C. It is initiated uni-directionally along the data path downstream from each requesting node.. RSVP reserves network resources uni-directionally along the data path, requiring a separate reservation for each flow direction.
Question
Which statement is true about the RSVP protocol?
Options
- AIt is reserved bi-directionally by each originating node.
- BIt is only for avoiding packet drop on collision-prone media (such as Ethernet).
- CIt is initiated uni-directionally along the data path downstream from each requesting node.
- DIt is only shared by pairs of peers participating in delay-sensitive, real-time applications like VoIP.
How the community answered
(45 responses)- B2% (1)
- C93% (42)
- D4% (2)
Why each option
RSVP reserves network resources uni-directionally along the data path, requiring a separate reservation for each flow direction.
RSVP does not reserve resources bi-directionally from a single session - each direction of a data flow requires its own separate RSVP setup.
RSVP is a network-layer QoS signaling protocol designed to work across any link type, not only collision-prone media such as Ethernet.
RSVP operates uni-directionally in the direction of data flow: the sender transmits PATH messages downstream toward the receiver to advertise traffic characteristics, and the receiver responds with RESV messages traveling upstream to trigger bandwidth reservation at each hop. Because resources are reserved only in one direction per session, a reverse flow requires an independent RSVP reservation.
RSVP is a general-purpose resource reservation protocol applicable to any traffic class requiring bandwidth or delay guarantees, not exclusively to VoIP or pairs of real-time peers.
Concept tested: RSVP uni-directional path reservation signaling
Source: https://www.rfc-editor.org/rfc/rfc2205
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